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Engine-Codes – Generic – B2318

B2318 Code - Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery

Quick Answer

The B2318 diagnostic trouble code (DTC) indicates a Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery. Common causes include Wiring harness damage or short circuit, Faulty vertical feedback potentiometer, Corrosion or poor connections in the mirror control module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B2318 indicates Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery.
Common causes
Common causes include Wiring harness damage or short circuit, Faulty vertical feedback potentiometer, Corrosion or poor connections in the mirror control module.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 26, 2024
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Code B2318 Description

The B2318 diagnostic trouble code (DTC) indicates a Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery. This code is specific to the passenger side mirror on the vehicle and relates to the vertical feedback potentiometer, which is responsible for adjusting the mirror's vertical position. The potentiometer is a variable resistor that provides feedback to the mirror control module, allowing it to accurately position the mirror based on user input.

OBDII Code B2318 - Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery
B2318 Code - Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery

Common Causes of B2318

  1. Wiring harness damage or short circuit.
  2. Faulty vertical feedback potentiometer.
  3. Corrosion or poor connections in the mirror control module.
  4. Electrical issues in the vehicle's power supply.
  5. Faulty mirror adjustment switch.

Symptoms of B2318

  1. Passenger side mirror not responding to adjustment controls.
  2. Mirror moving in the wrong direction or not stopping at the desired position.
  3. Erratic movement of the mirror when attempting to adjust it.
  4. Mirror adjustment controls not working at all.

How to Fix B2318

  1. Begin by inspecting the wiring harness for any visible damage or signs of a short circuit. Repair or replace any damaged wiring.
  2. Test the vertical feedback potentiometer for proper function. Replace it if it is faulty.
  3. Check the mirror control module for corrosion or poor connections. Clean or replace the module as needed.
  4. Verify the vehicle's power supply for any electrical issues that may be causing the short to the battery. Repair any faults in the power supply.
  5. Test the mirror adjustment switch for proper operation. Replace the switch if it is found to be faulty.

Cost to Fix B2318

The typical repair costs for addressing a Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery code can vary depending on the specific cause of the issue and the labor rates in your area. In general, you can expect to pay anywhere from $150 to $400 for parts and labor. Keep in mind that diagnosis time and labor rates at auto repair shops can vary, so it's recommended to obtain quotes from local shops for a more accurate estimate.

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Code B2318 Information for Specific Makes

  • B2318 Chrysler — Wiper On/Off Control Circuit High
  • B2318 Dodge — Wiper On/Off Control Circuit High
  • B2318 Ford — Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery
  • B2318 Jeep — Wiper On/Off Control Circuit High
  • B2318 Lincoln — Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery
  • B2318 Mercury — Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery
  • B2318 RAM — Wiper On/Off Control Circuit High
About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B2318 Code

1. What does the OBDII code B2318 mean?

B2318 indicates a problem with the passenger side mirror's vertical feedback potentiometer circuit, specifically a short to the battery.

2. What are the symptoms of code B2318?

Symptoms may include the passenger side mirror not adjusting vertically, erratic mirror movement, or the mirror being unresponsive.

3. What causes the B2318 code to be triggered?

Common causes include damaged wiring, a short circuit in the mirror adjustment circuit, a faulty potentiometer, or a defective mirror motor assembly.

4. How can I diagnose the B2318 code?

Start by inspecting the wiring and connectors for damage or corrosion, then test the potentiometer and related circuits for continuity and proper voltage.

5. Can I still drive my vehicle with the B2318 code active?

Yes, but the passenger mirror may not function properly, which could impact visibility and safety while driving.

6. How do I fix the B2318 code?

Repairs may involve replacing damaged wiring, repairing shorted circuits, or replacing the passenger side mirror assembly if the potentiometer or motor is faulty.

7. Is the B2318 code specific to certain vehicle brands?

No, it can appear on any vehicle equipped with power mirrors that use a feedback potentiometer circuit for vertical adjustment.

8. How much does it typically cost to repair the B2318 code?

The repair cost can vary widely but typically ranges from $100 to $300 depending on whether the issue is with the wiring or requires a new mirror assembly.

9. Can a blown fuse cause the B2318 code?

While a blown fuse is not a direct cause, it’s worth checking the fuse for the mirror system as part of the diagnostic process.

10. Will clearing the B2318 code with a scan tool fix the issue?

Clearing the code may temporarily remove it, but the underlying issue must be resolved to prevent the code from returning.

Discuss the causes and fixes for B2318 OBDII Code

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